i got a ct5s and it goes like a rocket!
i got it to 80kmh in a short area(netball courts
they can hit the 70mph mark, but you need alot of road.
after i hit 80, it seemed to be running out of revs, and space very quickly.
and 80kmh is the accurate speed, got a cop to clock it for me(hotwheel's speed gun is just not up to scratch!!!).
but this new car seems overkill. its simple physics. big HP, low weight= speed.
but no handling of course. mine sucks when a corner comes up.